Smart Energy International
Summary
The first commercial-scale solution for sand battery energy storage has been built as part of Vatajankoski Oy’s district heating network. It is touted by Fingrid as the world’s first sand battery built for commercial use, and is involved in the Finnish TSO’s balancing power market.
The sand battery was developed by Polar Night Energy as an efficient way of storing energy and reducing the emissions from district heating.
The seven-metre steel cylinder has been built outside a district heating plant in Kankaanpää, Finland, which contains sand that can be heated to approximately 500°C using inexpensive wind power.
The heat stored in the sand is then conducted onwards to Vatajankoski Oy’s district heating network. The storage has 100kW heating power and 8MWh capacity.
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